Steam-boiler for motor-vehicles.



PATENTED JAN. 20, 1903.

A. D. SMITH.

STEAM BOILER POB. MOTORl VEHICLES.

APPLICATION FILED JULY 1, 1901.

6 SHEETS-SHEET 1.

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.PATENTED JAN. 2o, 1903.

A. D. SMITH.

STEAM BOILER FOB. MOTOR VEHICLES.

APPLIOATION FILED JULY 1, 1901.

5 SHEETS-SHEET 2.

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No. 718,954. PATENTBD JAN. 20, 1903.

A. D. SMITH. STEAM BOILER FOR MOTOR VEHICLES.

APPLIGATION FILED JULY l, 1901.

lo IODBL. 5 ann-SHEET a.

No. 718,954. PATENTED JAN. 20, 1903.

A. D. SMITH.

STEAM EOILEE EOE MoToE VEHICLES.

APPIIGATION FILED JULY 1,1901. N0 MODEL. 5 SHEETS-SHEET 4.

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A. D. SMITH.

STEAM BUTLER FOR MOTOR VEHICLES.l

APPLIOATION FILED JULY 1, 1-901.

. NO MODEL.

5 SHEETS-SHEET 5.

TTnn STATES PATENT OFFICE.

ALLISON DALRYMPLE SMITH, OF EDINBURGH, SCOTLAND, ASSIGNOR OF TWO- THIRDSTO CHARLES STE\VART ROLLS, OF SOUTH LODGE, KNIGHTS- BRIDGE, ENGLAND, ANDNORMAN DORAN MACDONALD, OF EDINBURGH,

SCOTLAND.

STEAM-BOILER FOR MOTOR-VEHICLES.

SPECIFICATION forming part of Letters Patent N0. 718,954, dated January20, 1903.

Application filed July l, 190].. Serial No. 66H34. (No model.)

To all whom, t Netty concern:

Be it known that I, ALLisoN DALRYMPLE SMITH, mechanical engineer, asubject of the King of Great Britain, residing at 14 Hartington Gardens,Edinburgh, Scotland, have invented certain new and useful Improvementsin and Relating to Steam-Boilers for Motor- Vehicles and other LikeUses, (for which an application was made in Great Britain, dated roDecember S, 1900, No. 22,368 of which the following is a specication.

This invention relates to an improved water-tube boiler especiallydesigned for use in a motor-Vehicle.

In carrying out my invention I, in the case of a vertical boiler, formthe upper and lower multiples as rings of somewhat oblong crosssection,the tubes running from the inner ends of the respective multiples, theirends being zo fixed into the multiples in usual manner.

These multiples of annular form I produce from steel or other suitablemetal, preferably rolled in the form of weldless rings, and thenpartially or wholly turning the internal chamber from the solid to thedesired design, preferably thickening the metal toward the outer wall,forming the open end, so as to adapt it for the tap-holes to be formedtherein for studs by which to securely hold the cover- 3o plate ring toclose such open side of each multiple. This enables the two sides ofeach ring to be kept close together, whereby great strength and economyare attained, together with a minimum number of joints.

Figure 1 shows by an external elevation the arrangement of the parts fora vertical boiler. Fig. 2 is a vertical section of the boiler arrangedaccording To my invention, taken on the line A A of Fig. 5. Fig. 3 is ahorizontal 4o section taken on the line B B of Fig. 2. Fig.

4 is a horizontal section taken on the line C C of Fig. 2. Fig. 5 is aplan view taken with the gage and other usual adjuncls indicated inFigs. 1 and 2 omitted. Figs. 6 and 7 show details of constructionseparately to a larger scale.

The iigures show a vertical boiler consisting of the upper multiple aand lower multiple l), each of oblong cross-section, as more clearlyshown by the detail sectional views,

Figs. 6 and 7.

c c are `tu bes connecting the upper multiple a with the lower multipleb, and these tubes are xed in usual manner to those parts.

d d are studs tapped into the thickened portion of the Walls of theupper multiple at a', which studs serve to retain the cover-plate ringe. ff are corresponding studs tapped into the thickened portions b ofthe lower multiple b to retain the cover-plate ring g.

h represents the {ire-bars. These fire-bars may, as shown, be ofcircular form as a Whole, divided into, say, three sections forconvenience of removal, or otherwise. The bars on which the fuel restsare shown as straight and in cross-section at top angular, as at h',tapering at 722 downward from the base of the upper angles for aconsiderable depth, and finishing in a blunt curve h3. Each bar, asshown, may be deeper from edge to center, and each bar of greater lengthalso has a greater depth toward its center, so that the whole under sideof the lire-bars in contour approximates to a section of acircle inevery direction.

The vertical tubes may be of solid drawn steel. The annular wall i' t'of the fire-space j is of steel or other suitable metal lined withasbestos, as at 7c, or like non-conducting material.

Partially closing the opening l at the upper end-that is to say, withinthe circumference of the upper multiple a-is secured a steam and waterdrum or vessel m, having diminished ends forming necks m m, each ofwhich is turned so that it fits accurately to the upper multiple d, andthe opening m2 of each neck is brought exactly opposite a hole a2 in theinner side of the said multipleolJ and then secured, preferably, asshown, by a short length of boiler-tubing or a species of ferrule n n,which is passed from within the annular chamber of the multiple o. intothe meeting apertures @20012 in the multiple aand the neck,respectively, and these tubes n nare expanded therein by a suitable tooland a good joint secured. The segmental ends mof this steam and waterchamber m rest butt against the upper multiple d, which ring takes offthe pressure, and any tendency to burst out the ends of the drum is thuscounteracted. A convenient safety-valve passage, as at o, can be carriedup from the steam-drum to without the boiler-casing. In the upper partof the steam-drum I may also form a dome or extension upward, p, andfrom within this I take steam by a tube q, which extends upward towardthe top thereof and, passing away through one of the necks of the drumfm, is secured in the wall of the multiple a and then is connected tothe main steam-valve and is continued to the engine. The lower part ofthe drum m may be provided with a suitable fusible plug, as at fr', andconnections.

In the upper part of the casingis provided a convenient chimneys and adoor t, through which to effect the stoking and fuel-supply.

,Among the advantages attendant on this Yconstruction of upper and lowermultiples for connection to the tubes is the facility afforded forquickly cleaning out any fouled tubes by simply removing the cover-plateor base-ring by removing the nuts from their studs, when all the tubeswill be accessible from below. If a tube burst or otherwise requires tobe removed, it becomes only necessary to remove the top of the casing,the upper annular cover-plate of the upper multiple, and thecorresponding plate of the lower multiple to knock out the damaged tubeand replace it by a fresh one without having to disturb the adjustmentsof the other parts. The number of parts in the construction is also bymy invention greatly reduced.

' The usual boiler-mountings are applied as needed.

Having now particularly described and ascertained the nature of my saidinvention and in what manner thesame is to be performed, I declare thatwhatI claim isvl. A multiple for steam-boilers comprising an annularhollow body having a continuous opening in one end, the inside walls ofsaid hollow body being inclined toward each other as they approach thesaid open end to provide side walls of gradually-increasing thicknessand a closure-plate for said opening.

2. A multiple for steam-boilers comprising an annular hollow bodyhaving-a continuous opening in one end, the inside walls of said bodybeing inclined toward each other as they approach the said open end toprovide side walls of gradually-increasing thickness, the outer andinner edges of said side walls adjacent to the open end being enlargedor thickened, and a covering-ring or an nulus for said open end.

3. A multiple for steam-boilers comprising in its construction anannular hollow body having a continuous opening in one end, the innerfaces of the side walls of said hollow body beingincliued toward eachother as they approach the said open end to provide side walls ofgradually-increasing thickness.

4. In a steam-boiler for motor-vehicles and the like, an upper and alower annular multi ple suitably communicatingwith each other, a drumhaving two sides shaped to conform to the inner peripheral wall of theupper multiple and secured to the latter at these points, said drumhaving communication with the multiple to which it is attached, a domerising from the drum, and a steam-pipe extending from within the domethrough the drum and upper multiple for supplying steam to an engine.

5. In a steam-boiler, the combination with an upper annular multiple, ofa lower multiple, pipes for establishing communication between saidmultiples, a drum arranged within the opening formed by the annularmultiple and having two sides shaped to conform to the inner peripheralwall of said multiple and embracing said wall to form a close it betweenthese parts, a pair of tubes extending through the connecting-walls ofthe drum and multiple respectively for establishing communicationbetween these elements, and a steam-pipe leading from the drum.

6. In a steam-boiler for motor-vehicles and the like, an upper and lowermultiple, pipes for establishing communication between the saidmultiples, fire-bars arranged within the lower multiple, a drum arrangedwithin the* upper multiple, a pair of tubes extending in the drum and inthe upper multiple for connecting the latter to the former andestablishing communication between them, adome connected to the top ofsaid drum and communicating therewith, and means extending in the domeand through the drum and upper multiple for supplying the engine withsteam.

7. In a steam-boiler, an upper and a lower multiplehavingintercommunicating pipes, a drum secured to the upper multiple andhaving communication therewith, a dome rising from the drum, and asteam-pipe leading from the dome and extending through the drum andupper multiplo, substantially as described.

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